Looper for sewing-machines.



J. R. MOFFATT.

LOOPER FOR SEWING MACHINES.

APPLIUATION FILED DEG.2.1911.

1,1 1 5,086, Patented 0ct.27,1914.

JAMES B, MorrA'rr, or CHICAGO,

ILLINOIS, ASSIGNOR-TO'UNION- SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.'

LOOPER FOR SEWING-MACHINES.

Specification of Letters Patent.

Patentd O cti 27, 1914.

Application filed December 2, 1911. Serial No. 663,643.

To all whom it may concern Be it known that I, JAMES R. MOFFATT, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Loopers for Sewing-Machines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

The invention relates more particularly to new and useful improvements in the thread carrying loopers of a multiple needle stitching machine.

An object of the invention is to provide means for guiding and shielding the thread of each looper so as to prevent the looper thread from bulging into the path of the needles when said needles are passing the loopers to enter the triangles formed by the needle loops, looper threads and the body of the loopers of each respective looper.

The application of this present form of looper to a commercial machine, is illustrated in the multiple sewing machine, on which patent was applied for by Ralph S. Kelso and myself, November 4th, 1911, Serial No. 658,564, but it will be understood that I do not wish to be limited to such particular use of the looper.

Therefore, the present invention consists in a looper constructed substantially as described and hereinafter referred to in the appended claim.

The invention is illustrated in the accompanying drawings, in which,

Figure 1 is a side view of the looper carrier arranged to support three loopers of my construction; Fig. 2 is a top plan view of Fig. 1; Fig. 3 is a side elevation of one of the loopers; and, Fig. '4 is a sectional plan of Fig. 3, illustrating also diagrammatically the course of the thread and a portion of another looper.

In these drawings, 1 represents the three needles of the multiple needle sewing machine, and 2, the loopers supported by the usual oscillating looper carrier 3. Each looper has a continuous groove running substantially from one end to the other, but said groovehas two sections of it, 1 and 6 respectively, upon the front face, while the intermediate section 5 of the groove is on the rear face. This intermediate section 5 18 however, connected with the adjacent sections 4 and 6 by eyes 7 and 8 respectively. The course of the thread through the looper is therefore, through the rear eye 9, groove section 4, eye 7, groove section 5, eye 8, groove section 6, and out through the eye 10 in the point of the looper.

By referring to Figs. 2 and 4, the operation of the looper will be understood. In Fig. 2, the loopers are moving forward just entering the needle loop. In Fig. 4 the needles are coming down to engage the thread triangle, and it will be noted in connection with the looper 2, that by reason of the groove section 5, the thread is so guided that it will not bulge to the front and run the risk of being engaged by the front needle, as the latter is coming down. In other words, this invention provides a thread guiding and shielding groove, which is of special importance in multiple needle sewing machine, especially where the needles are set close together, and arranged to form independent rows of stitching at a very slight distance apart.

From the above description it will be apparent that I have provided a looper construction for a multiple needle machine wherein the loopers in rear of the forward looper on the carrier are set successively in advance of the looper in front thereof and each of these rearward loopers are so constructed that the looper thread is carried to the rear face of the looper at that section in each looper where the needle passes to enter its thread triangle formed by the previous needle loop, the looper thread and the body of the looper. This properly shields the looper threads so as to prevent any interlocking of the needles with the looper threads of the next adjacent loopers, and the loopers may be set very close together.

Having thus particularly described my invention, what I claim as new and desire to secure by Letters Patent is:

A looper carrier having a plurality of loopers mounted thereon, the loopers in rear of the forward looper being set suctering the thread triangle of its cooperating cessively with their pointsm advance of the looper. 10 looper in front thereof, each of said rear- In testimony whereof I affix my signature, wardlooperslmvinga thread groove formed in presence of two witnesses.

in part on the mnface thereof at the sec- JAMES R. MOFFATT.

tion of the loupcr passed by the next ad- Witnesses:

jncent needle on the needle avoiding move- A. B. CLOTHIER,

ment of the looper when said needle is en- FRANCIS S. NORTH 

